The video uploaded by LG Global Mobiles channel on YouTube clearly shows the three smartphones with names listed at the end. The company however, has not publically launched the smartphone. Also, there is no word on the specifications of the handset just yet. From the video its not hard to decipher that the K4 is smaller than both K7 and the K10, which feature 5-inch and 5.3-inch displays respectively.

LG, while launching the K Series smartphone earlier this month, said the new lineup succeeds its L-Series. The South Korean tech giant touted the smartphone duo's glossy pebble design, its photography capabilities, as well as the 'premium UX' features from higher-end devices.

The South Korean consumer electronics giant earlier this week announced that the LTE variant of the fashion-focused mid-range K10 smartphone is priced at KRW 200,000 (roughly Rs. 11,000, or $164). It will go on sale in South Korea later this month, and other variants will launch in the global market in the coming weeks.

Aimed at customers looking to purchase an affordable smartphone, the LG K10 sports both impressive design and hardware modules, with several configurations available for different regions. It was launched in 3G and LTE variants, three RAM variants, two processor variants, and two camera variants.

"Our 2016 K Series is the latest example of LG applying it best mobile technology and premium design philosophy across numerous smartphone categories," said Juno Cho, president and CEO of LG Electronics Mobile Communications Company during the launch.